Question

the expression x^4-9

a. (x^2-3) (x^2-3)

b. (x^+3) (x^+3)

c. (x^2+3) (x^2-3)

d. (x^+1) (x^2-9)

Answer 1

Answer: C

Step-by-step explanation:

By the difference of squares, $x^{4}-9=(x^{2}+3)(x^{2}-3)$